钻挖一体式挖掘机流量再生与能量回收节能研究

采用一机多能型挖掘机进行复杂的管路施工，给管道工程带来了极大的便利。在挖掘和钻孔作业时，动臂下降的重力势能会转化为液压能并在溢流阀处流回油箱形成溢流损失。在动臂的液压油路中设置流量再生回路，提高动作速率。利用阀控系统回收动臂下降的重力液压势能，将回收在蓄能器中的液压能驱动定量马达带动发电机发电,将电能储存在蓄电池中，为挖掘机上其他用电器提供电能。利用AMESim软件进行液压仿真，与现有的挖掘机相比，回收动臂下降液压能极大地提高了系统能量利用率，流量再生提高了挖掘机运动速率。研究结果表明:动臂下降能量回收效率为40%左右。

Research on Flow Regeneration and Energy Recovery and Energy Saving of Drilling and Digging Integrated Excavator

The use of a multi-functional excavator for complex pipeline construction brings great convenience to pipeline engineering. During excavation and drilling operations, the gravitational potential energy of the boom is converted into hydraulic energy and flows back to the oil tank at the overflow valve to form overflow loss. A flow regeneration loop was set in the hydraulic oil circuit of the boom to improve the action rate. The valve control system was used to recover the gravity hydraulic potential energy dropped by the boom, and the quantitative motor was driven by the hydraulic energy recovered in the accumulator to motivate the generator to generate electricity. The electric energy was stored in the battery to provide electric energy for other electrical appliances of the excavator. Using AMESim software for hydraulic simulation, compared with existing excavators, recovering the hydraulic energy of the boom descent greatly improves the energy utilization rate of the system, and the flow regeneration improves the movement speed of the excavator. The research results show that the energy recovery efficiency of boom descent is about 40%.